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Dr. Johnson purchased 5.5 gallons of gasoline for $2.80
per gallon. How much change did he receive from a twenty--
dollar bill?
If he has to pay $2.80, That will basically equal $3 and a few cents because the two will rise up to three since the number to the right is higher than 4, there is a saying that goes 4 or less let it rest 5 or more raise the score. So, if you subtract 2.80 from 20 you get 17.2
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